The Yealink T48S SIP Skype for Business phone offers most of the features of the Yalink T4x series, plus it's Microsoft certified for Skype for Business, so you can take full advantage of Skype for Business and still make calls from your desk phone. The Yealink T48S SIP Skype for Business phone has a 7 inch touch screen display. It's as easy to use as a smartphone. Even the display of photos is possible. With 480 x 800 pixels and a very good backlight it offers best quality. Yealink's Optima HD speech technology combines state-of-the-art hardware and software with broadband technology for a fantastic sound experience. The fully open, highly versatile OPUS audio codec has been designed to achieve higher HD audio quality than other broadband codecs while maintaining high bandwidth on a network. This fantastic technology is included as standard with the Yealink T48S SIP Skype for Business phone. It also has a telephone receiver that is hearing aid compatible. Your employees will have the feeling that you are in the same room as your conversation partner. Of course, you also have the option of connecting a headset to the telephone via Bluetooth. In addition to the intuitive touch screen, the Yealink T48S SIP Skype for Business phone has 29 individually programmable DDS keys and seven function keys. This makes it particularly user-friendly.